I have printed loads of bits without, biggest problem is difference in temperate that can cause it to warp or lift from build plate (you want the build plate to be very hot and use glue or some sort of adhesive).
It takes some patience to find the sweet spot, but once you have its brilliant, I've just had too many problems with PETG (but friends and others have not). I have a dry box and I keep all filament in sealed bags with silica gel bags in.
I have been making an enclosure using an IKEA Lacke table as a base and printing the bits needed, I now have plexiglass doors to fit to finish it off (but I've not printed in a while).
View attachment 147737
I put LEDs on top of each one and I designed a feed from top to bottom so it's smooth and feeds from my dryer box at the top.
With the doors on it will keep temperatures nice and consistent, people say they had smell and fumes from ABS, I've had zero from Sunlu ABS